1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

The State Of OpenGL 3.x in Mesa Core

Mesa

Published on 31 December 2009 05:28 AM EST
Written by Michael Larabel in Mesa
15 Comments

While ATI R600 users only recently received OpenGL 2.0 hardware support within the open-source Radeon 3D stack and there is many more OpenGL extensions to be implemented just not for the ATI Mesa driver but the other DRI drivers as well, Brian Paul has published a document that lays out the current state of OpenGL 3.x within the classic Mesa core. This document lays out what core Mesa supports and not necessarily that any of the drivers are implementing the said support at this time. Granted, with Mesa not really being very performance-efficient at this time or capable of running most games, a majority of users will be waiting for the OpenGL 3.x state tracker for Gallium3D.

Mesa has been slowly picking up OpenGL 3.x support for a number of months now, with Intel in particular being interested in the OpenGL 3.x support for classic Mesa rather than Gallium3D at this time. Anyhow, when it comes to OpenGL 3.0 support for Mesa core, the key items still to be tackled include the GL Shading Language (GLSL) changes, conditional rendering, transform feedback, and sRGB framebuffer format. There are also some items like float textures that have work underway but not completed. When it comes to what's completed for OpenGL 3.0 there is frame-buffer objects, multi-sample blit, packed depth/stencil formats, per-buffer blend and masks, vertex array objects, and glClearBuffer / glGetStringi.

For OpenGL 3.1 the only features working in Mesa core are buffer copying and rectangular textures. Other OpenGL 3.1 features like instanced drawing, GLSL 1.40, primitive restart, and uniform buffer objects still need to be tackled.

The current latest and greatest OpenGL spec from the Khronos Group is OpenGL 3.2 (though it should be outdone by OpenGL 3.3 in 2010). With regards to OpenGL 3.2 support the GL_ARB_vertex_array_bgra, GL_ARB_draw_elements_base_vertex, GL_ARB_provoking_vertex, GL_ARB_seamless_cube_map, GL_ARB_depth_clamp, and GL_ARB_sync extensions are implemented in the core of this free software OpenGL implementation. Still to be worked on here is GLSL 1.50 support (though that's no surprise considering GLSL 1.30/1.40 support is still missing), compatibility profiles, geometry shaders, fragment shader coordinate conventions, and multi-sample textures.

The current OpenGL 3.x status page can be found in this Git text file. Sadly, OpenGL 3.3 should be out (and then OpenGL 3.4) before all of the OpenGL 3.x functionality finds its way into core Mesa and then the hardware drivers.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Articles & Reviews
  1. Ubuntu vs. Fedora Linux On Lenovo's X1 Carbon With Core i7 Broadwell
  2. Ubuntu 15.04 Is The Easy Path To Better Performance On Intel Broadwell
  3. NVIDIA's Latest Maxwell Line-Up Against AMD With Catalyst On Linux
  4. Preliminary Tests Of Intel Sandy Bridge & Ivy Bridge vs. Broadwell
  5. AMD FX-8320E Performance On Linux
  6. Linux Compiler Benchmarks Of LLVM Clang 3.5 vs. LLVM Clang 3.6-rc1
Latest Linux News
  1. Free Software Foundation Endorses Another (Outdated) Laptop
  2. DNF Plugins Extend The Functionality Of Fedora's Yum Successor
  3. LibreOffice 4.4 Released With Better OOXML Support, UI Improvements
  4. Inkscape 0.91 Goes Through C++ Code Conversion, New Cairo Rendering, OpenMP Filters
  5. New Mesa Patch To Improve CPU-Bound Applications
  6. LLVM Adds Options To Do Fuzz Testing
  7. Coreboot Now Supports Another Dual-Socket AMD Motherboard
  8. Atomic Mode-Setting/Display Support Progresses In Linux 3.20
  9. NVIDIA 340.76 Brings Three Stable Fixes
  10. Intel Broadwell-U P-State vs. ACPI CPUFreq Scaling Linux Performance
Most Viewed News This Week
  1. PlayStation 4 System Compiler Support Landing In LLVM
  2. LibreOffice 4.4 Is Coming Soon With New Features
  3. Linux "GHOST" Vulnerability Hits Glibc Systems
  4. My Initial Intel Broadwell Linux Experience With The ThinkPad X1 Carbon
  5. Broadwell Linux Ultrabook Running MUCH Cooler Than Haswell
  6. LZHAM 1.0 Lossless Data Compression Codec Released
  7. Linux Users Upset By Chromium's Busted HiDPI Support
  8. Interstellar Marines On Linux With Catalyst: Bull S*#@